Assicxnor- to pierre



(No Model.)

G. A. BARTH.

TRUNNION FOR CYLINDERS.

Patented Feb. 26. 1889.

IJYUZVTOE,

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X4 WW1? pivot or trunnion UNiTEn STATES GUSTAV A. EARTH, OF ST. LOUIS,

MISSOURI, ASSIGNORv TO PIERRE l'IOUTEAIT, OF SAME PLACE.

TRUNNlON FOR CYLINDERS.

SPECIFICATION forming Application filed October 22, 1888.

To all [chm/t I! may cone a771,.- i

Be it known that I, t-XUSTAV' A. EARTH, a citizen of the United States, residing at the 5 city of St. Louis, State of h'lissouri, have ini vented a certain new and useful Improve-l ment in Pivots or Trunnions for SteanrOyli inders and other Apparatus having a Pivotal Movement, of which the following is a full, 1 clear, and exact description.

My invention relates to an improved pivot or trunnion applicable to steam-cylim'lers, guns, and other apparatus subjected to oscilla-tory or rotary movement, and has for its 1 object to provide a pivot or trunnion which can be readily fixed to or detached from the 1 object to be titted therewith.

It consists in a screwbolt the head of which 1 is inserted and confined withina slot formed in the side of the cylinder or other object. i Around the externally-projecting portion of the bolt is a bush or sleeve having preferably a collar at each end, the whole being tightened together and to the cylinder or other object by a nut on the outer screwed end of l the bolt bearing again. one oil the said 001- l lars.

On the accompanying drawings, Figure 1 represents a side elevation of my improved pivot or trunnion; Fig. 2, an end view thereof; Fig. 3, a transverse section on line 1 l in Fig. 1; and liig. i, an end view, to a reduced St'illO, ot' the trunnion applied to the side of a stez'un-eylinder. like letters of reference de-l noting like parts in all the figures.

(1 represent a bolt having a square (or other suitably shaped) head, I), which, with a portion oi the lmii It adjacent thereto, is insorted sidewise within the open end of and along a T-shaped slot, 1-, formed in the casting or material 1! ol the object to which the is to he applied, the slot (1 a being so arranged that the external portion of the bolt (.1. will project therefrom at right angles to the plane of" rotation or oscillation of the casting (I.

Around the projecting plain portion of the bolt (1 is fitted a bush or sleeve, P. which is formed at its inner i. .d preferably with a collar, f, bearing against the outside of the casting d. On the reduced screwed end portion, a, of the belt a is placed a washer, g,

' latter with the sleeve 6 against and at the same time draws the bolt (1,

p b tight againstpart of Letters Patent No. 398,571, dated February 26, 1889.

Serial No. 288,835. on modeLi which bears against and forms a collar to the outer end of the sleeve 6, which, with its collars f and g, constitutes the journal of the pivot. or trunnion.

(in the screwed end a" of th bolt a is placed a nut, 71, which, on being screwed up hard against the outside of the washer g, tightens the the casting d, so as to clamp the shoulder or under side of its head the inside of the slot 0, whereby the entire pivot or trunnion is securely fixed endwisc to the casting (I; or, if desired, in lieu of the reduced screwed end portion, a, of the bolt a, the latter with its screwed end maybe made of equal diameter throughout.

Fig. 4 illustrates the application ot my invention to a horizontally-oscillal ing steamcylinder, I), having at opposite parts of its circumference projections d, in which are formed the slots (2 for receiving the pivots or trunnions, the direction of the slots 0 being preferably at right angles to the vertical line of gravity of the cylinder D.

I claim as my invention 1. The combination, with a cylinder having sloi ted projections, of detachable slecve-trun nions, and T-headed bolts and nuts for securing the sleeve-trunnions to said cylinder, substantially as and for the purposes described.

The combination, with a cylinder having slotted projections, of detachable sleeve-trunnions provided with collars, and T-headed bolts and nuts for securing the sleeve-trunnions to said cylinder, substantially as and for the purposes (.lescribed.

1-1). The combination,with a cylinder having slot-i ed p|' jeetioiis, of detachable slce\"c-trunnions provided. with collars and washers, and T-headed bolts and nuts for securing the sleeve-trunnions to said cylinder, substantially as and for the. purposes described.

In testimony whereof I affix my signature, in presence of two witnesses, this 18th day of October, 1988.

GUSTAV A. EARTH.

Witnesses:

SARA L. SCHRADER, PAUL BAKEWELL. 

